Fix PW overriding custom screen width/height #89

patches/screen-hijacker.patch

@@ -1,5 +1,22 @@
+diff --git a/dom/base/nsScreen.cpp b/dom/base/nsScreen.cpp
+index f9ae3bb56c..3af597c40f 100644
+--- a/dom/base/nsScreen.cpp
++++ b/dom/base/nsScreen.cpp
+@@ -65,6 +65,12 @@ nsDeviceContext* nsScreen::GetDeviceContext() const {
+ }
+ 
+ CSSIntRect nsScreen::GetRect() {
++  // Check for height and width overrides
++  if (auto height = MaskConfig::GetInt32("screen.height"),
++      width = MaskConfig::GetInt32("screen.width");
++      height && width) {
++    return {0, 0, width.value(), height.value()};
++  }
+   // Return window inner rect to prevent fingerprinting.
+   if (ShouldResistFingerprinting(RFPTarget::ScreenRect)) {
+     return GetTopWindowInnerRectForRFP();
 diff --git a/gfx/src/moz.build b/gfx/src/moz.build
-index a2b3e60fe5..56326fc038 100644
+index a2b3e60fe5..faa0c113bc 100644
 --- a/gfx/src/moz.build
 +++ b/gfx/src/moz.build
 @@ -95,3 +95,6 @@ FINAL_LIBRARY = "xul"